LONDON (Reuters) - Hackers behind last week's $530 million cryptocurrency heist - one of the biggest ever - have started trying to sell some of the stolen "XEM" coins, the vice president of the foundation behind the digital currency said on Tuesday.

LONDON (Reuters) - Hackers behind last week's $530 million cryptocurrency heist - one of the biggest ever - have started trying to sell some of the stolen "XEM" coins, the vice president of the foundation behind the digital currency said on Tuesday.